Composite supporting anchor rod for coal mine tunnel

Abstract

The utility model relates to the technical field of anchor rod support, and provides a composite support anchor rod for a coal mine tunnel, which comprises an anchor rod, a first threaded part is arranged on the outer side of the lower part, a second threaded part is arranged on the upper part, the outer diameter of the second threaded part is smaller than the inner diameter of the first threaded part, and the second threaded part and the first threaded part are opposite in thread turning direction; the locking nut is in threaded connection with the first threaded part; the stirring nut is in threaded connection with the second threaded part, and the stirring nut is used for driving the anchor rod and the locking nut to rotate after being connected with the second threaded part; and the tray is arranged on the outer side of the second threaded part in a sleeving mode, and the locking nut is used for abutting against the tray. By means of the technical scheme, the problems that in the prior art, the construction process of the anchor rod is troublesome, and the construction efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of anchor bolt support technology, and in particular to a composite support anchor bolt for coal mine roadways. Background Technology

[0002] During mining and other construction processes, the surrounding rock of the excavated tunnel needs to be supported. Anchor bolts are used to attach and fix the protective netting to the surrounding rock to enhance safety protection.

[0003] In the prior art, patent application number 201210587228.6 discloses an anchor bolt for supporting underground roadways in coal mines, and introduces the anchoring agent and anchor bolt support process. It uses the rotation of the sleeve of the anchor bolt drilling machine to provide rotational driving force to fix the anchor bolt in the drill hole. However, the construction process is relatively troublesome, which affects the construction efficiency. In addition, when using the anchor bolt to mix the anchoring agent, the right-handed anchor bolt has a force that transports the anchoring agent outward when rotating clockwise, which causes the anchoring agent in the anchor bolt hole to be loose, resulting in the problem of easy loosening later.

[0004] In existing technologies, the construction process of anchor bolts is relatively complicated, and the problem of low construction efficiency needs to be solved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a composite support anchor for coal mine roadways, which addresses the above-mentioned technical deficiencies. This solves the problems of cumbersome construction process and low construction efficiency of existing anchors.

[0006] The technical solution adopted by this utility model is: to provide a composite support anchor rod for coal mine roadways, with a locking nut that is threadedly connected to the first threaded part;

[0007] A stirring nut is threadedly connected to the second threaded portion. After the stirring nut is connected to the second threaded portion, it is used to drive the anchor body and the locking nut to rotate.

[0008] The tray is fitted onto the outside of the second threaded portion, and the locking nut is used to abut against the tray.

[0009] To further optimize this technical solution, the first threaded portion is right-handed, and the second threaded portion is left-handed.

[0010] Further optimizing this technical solution, the upper end of the tray has a circumferential groove; the locking nut has a barbed needle on the side opposite to the tray; and it also includes:

[0011] A pigment packet is disposed within the groove, and the pigment packet contains pigment.

[0012] A sealing cap is disposed on the upper end of the tray, covering the groove, a locking nut abuts against the sealing cap, and a needle is used to pierce the pigment packet.

[0013] To further optimize this technical solution, the pigment packet is now circular.

[0014] To further optimize this technical solution, a limiting piece is provided on the inner wall of the groove, and the limiting piece abuts against the outer wall of the pigment pack.

[0015] To further optimize this technical solution, the lower end of the tray has a mounting groove along the annular axis; it also includes:

[0016] A positioning tube is fitted inside the mounting groove. The lower end of the positioning tube has several spaced-apart pins arranged in a ring shape. The pins are located outside the mounting groove.

[0017] To further optimize this technical solution, the lower end of the anchor rod body has an inner groove, and the inner wall of the inner groove has texture.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The first and second threaded parts rotate in opposite directions, allowing the sleeve of the anchor drilling rig to be fitted onto the locking nut and the stirring nut. The sleeve rotates in the tightening direction of the second threaded part. Through the connection between the stirring nut and the anchor rod, the sleeve drives the anchor rod body to rotate and stir the anchoring agent. After stirring is completed, the sleeve can be reversed to remove the stirring nut. At the same time, the locking nut is tightened and abuts against the tray to complete the support and fixation. This simplifies the construction process, improves construction efficiency, and reduces damage to the anchor rod.

[0020] 2. The first and second threaded parts rotate in opposite directions. When the stirring nut is tightened to the second threaded part, the first threaded part can generate a transport force into the borehole, preventing the anchoring agent from being transported outward. The anchoring agent gathers into the borehole, making it more compact and providing a more stable fixation for the anchor rod body. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the anchor bolt structure of this utility model;

[0023] Figure 3 For the present utility model Figure 2 A magnified schematic diagram of the structure at point a in the middle;

[0024] Figure 4 This is a front view structural diagram of the present utility model;

[0025] Figure 5 For the present utility model Figure 4Schematic diagram of the cross-sectional structure at position AA;

[0026] Figure 6 For the present utility model Figure 5 A magnified schematic diagram of the structure at point b in the middle;

[0027] Figure 7 For the present utility model Figure 5 A magnified schematic diagram of the structure at point c in the middle;

[0028] Figure 8 This is a schematic diagram of the tray structure of this utility model;

[0029] Figure 9 This is a schematic diagram of the locking nut structure of this utility model;

[0030] The markings in the diagram are as follows: 1. Anchor bolt body; 101. First threaded part; 102. Second threaded part; 103. Inner groove; 1031. Texture; 2. Locking nut; 201. Needle; 3. Stirring nut; 4. Tray; 401. Groove; 4011. Limiting piece; 402. Mounting groove; 5. Pigment pack; 6. Sealing cap; 7. Positioning tube; 701. Pin. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0033] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] like Figure 1-9As shown, a composite support anchor bolt for coal mine roadways includes: an anchor bolt body 1, with a first threaded portion 101 on the lower outer side and a second threaded portion 102 on the upper side. The outer diameter of the second threaded portion 102 is smaller than the inner diameter of the first threaded portion 101, and the threads of the second threaded portion 102 and the first threaded portion 101 have opposite directions of rotation; a locking nut 2, threadedly connected to the first threaded portion 101; a stirring nut 3, threadedly connected to the second threaded portion 102, which, after being connected to the second threaded portion 102, drives the anchor bolt body 1 and the locking nut 2 to rotate; and a tray 4, sleeved on the outside of the second threaded portion 102, with the locking nut 2 abutting against the tray 4. The first threaded portion 101 is right-handed, and the second threaded portion 102 is left-handed.

[0036] In use, taking the first threaded part 101 as right-handed and the second threaded part 102 as left-handed as an example, after the anchoring agent is placed into the borehole, the first threaded part 101 of the anchor rod body 1 extends into the borehole. A tray 4 is fitted onto the anchor rod body 1, and the tray 4 has a through hole in the middle. A locking nut 2 is screwed into the upper part of the first threaded part 101, and a stirring nut 3 is screwed into the second threaded part 102. After the stirring nut 3 is tightened, it rotates together with the anchor rod body 1 in the tightening direction. The sleeve of the anchor rod body 1 is fitted over the locking nut 2 and the stirring nut 3. The sleeve rotates left-handed, which is the tightening direction of the stirring nut 3. The anchor rod body 1 and the locking nut 2 rotate synchronously. When the first threaded part 101 rotates right-handed and left-handed, the anchoring agent is stirred and compacted into the borehole at the same time, preventing the anchoring agent from being transported out of the borehole. After the anchoring agent solidifies, rotate the sleeve clockwise. Rotating the stirring nut 3 clockwise will unscrew it, disengaging it from the second threaded part 102. Rotating the locking nut 2 clockwise will tighten it, causing it to abut against the tray 4, thus completing the support.

[0037] The stirring nut 3 is reusable. The stirring nut 3 and the locking nut 2 have the same outer dimensions. They are simultaneously fitted into the sleeve, which simplifies the structure of the sleeve and eliminates the need for special fitting.

[0038] Furthermore, the upper end of the tray 4 has a groove 401 along the annular shape; the locking nut 2 has a needle 201 on the side opposite to the tray 4; it also includes: a pigment bag 5, disposed in the groove 401, containing pigment; a sealing cap 6, disposed on the upper end of the tray 4, covering the groove 401, the locking nut 2 abutting against the sealing cap 6, and the needle 201 for piercing the pigment bag 5. The pigment bag 5 is annular.

[0039] During use, the pigment pack 5 serves as a reminder of whether the locking nut 2 is loose, allowing workers to tighten it promptly. The locking nut 2 is abutted against the tray 4 via the sealing cap 6, which encloses the pigment pack 5 within the groove 401. When the locking nut 2 is tightened, the needle 201 punctures the sealing cap 6 and the pigment pack 5, causing the pigment inside to flow out. However, the sealing cap 6 keeps the pigment within the groove 401. When the locking nut 2 loosens, the sealing capacity of the sealing cap 6 decreases, allowing the pigment to flow out, which is easily observed by workers.

[0040] Pigment pack 5 stores pigment for quick installation during initial support construction. For later maintenance, pigment can be injected into the groove 401 sealed by the sealing cap 6 via injection or other methods. The sealing cap 6 can be made of materials such as rubber.

[0041] There can be multiple pigment packets 5, or they can be ring-shaped. Multiple needles 201 can also be provided. When the sealing cap 6 covers the pigment packet 5, the pigment packet 5 can be squeezed to fill the groove 401, which makes it easy for the needle 201 to puncture. After the needle 201 is inserted, it still has a rotating motion, which can ensure that the pigment packet 5 leaks.

[0042] Furthermore, the inner wall of the groove 401 has a limiting piece 4011, which abuts against the outer wall of the pigment pack 5.

[0043] During use, the limiting piece 4011 on the inner wall of the groove 401 can secure the pigment bag 5, making it easy to install and also making it easy for the needle 201 to pierce the pigment bag 5. The limiting piece 4011 can be set on one side or it can be a "U" shaped structure.

[0044] Furthermore, the lower end of the tray 4 has a mounting groove 402 along the annular shape; it also includes a positioning tube 7, which is sleeved in the mounting groove 402, and the lower end of the positioning tube 7 has a number of spaced-apart pins 701 along the annular shape, with the pins 701 located outside the mounting groove 402.

[0045] When in use, the mounting groove 402 at the lower end of the tray 4 reduces the material required for the tray 4. Simultaneously, after installing the positioning tube 7, the positioning tube 7 can more stably press down on the protective netting, improving the stability of the protective netting, reducing slippage, and enhancing safety. The pins 701 have a groove structure between them, which can either fit over the protective netting or press it down.

[0046] Furthermore, the lower end of the anchor bolt body 1 has an inner groove 103, and the inner wall of the inner groove 103 has a texture 1031.

[0047] During use, as the anchor bolt body 1 rotates, the anchoring agent is screwed into the borehole. The anchoring agent can enter the inner groove 103 at the lower end of the anchor bolt body 1. After mixing, it solidifies in the inner groove 103. Through the texture 1031, the stability of the anchor bolt body 1 is enhanced. The texture 1031 can take various forms, such as threaded, annular, broken-line raised structure, or grid pattern, etc. It can be made in a form that is easy to process or combined for installation, thus reducing costs.

[0048] It is understood that this utility model has been described through some embodiments, and those skilled in the art will know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A composite support anchor for coal mine roadways, characterized in that, include: The anchor body (1) has a first threaded part (101) on the lower outer side and a second threaded part (102) on the upper part. The outer diameter of the second threaded part (102) is smaller than the inner diameter of the first threaded part (101), and the threads of the second threaded part (102) and the first threaded part (101) have opposite directions. The locking nut (2) is threadedly connected to the first threaded part (101); The stirring nut (3) is threadedly connected to the second threaded part (102). After the stirring nut (3) is connected to the second threaded part (102), it is used to drive the anchor body (1) and the locking nut (2) to rotate. The tray (4) is fitted on the outside of the second threaded part (102), and the locking nut (2) is used to abut against the tray (4).

2. The composite support anchor bolt for coal mine roadways according to claim 1, characterized in that, The first threaded portion (101) is right-handed, and the second threaded portion (102) is left-handed.

3. The composite support anchor bolt for coal mine roadways according to claim 1, characterized in that, The upper end of the tray (4) has a groove (401) along the annular shape; the locking nut (2) has a needle (201) on the side opposite to the tray (4); it also includes: Pigment packet (5) is disposed in the groove (401), and pigment packet (5) contains pigment; A sealing cap (6) is provided on the upper end of the tray (4) and covers the groove (401). The locking nut (2) abuts against the sealing cap (6), and the needle (201) is used to pierce the pigment pack (5).

4. A composite support anchor for coal mine roadways according to claim 3, characterized in that, The pigment packet (5) is circular.

5. A composite support anchor for coal mine roadways according to claim 4, characterized in that, The groove (401) has a limiting piece (4011) on its inner wall, and the limiting piece (4011) abuts against the outer wall of the pigment pack (5).

6. A composite support anchor for coal mine roadways according to claim 1, characterized in that, The tray (4) has a mounting groove (402) along its lower end in a ring shape; it also includes: A positioning tube (7) is fitted inside the mounting groove (402). The lower end of the positioning tube (7) has a number of spaced pins (701) arranged in a ring. The pins (701) are located outside the mounting groove (402).

7. A composite support anchor for coal mine roadways according to claim 1, characterized in that, The lower end of the anchor body (1) has an inner groove (103), and the inner wall of the inner groove (103) has a texture (1031).

Images